i find it interesting that so many keep posting the same, he gets it. 1 or 2 person telling the same thing is enought ? maybe some are just trying to get more posts under the belt? still trying to figure it out. If your main keywords are in your url.. lucky you
Simple html should do the Trick. just add html://www.yoursite.com and its done,iv done tons of times.
I think it would be better to include your url to sources if it is related to the post of yahoo answers. You could contact them if you had more questions about it so that yahoo users won't regard it as spam or something